A mothership sweeps across the top of the screen. Drop your lander through a drifting meteor belt, thrust to touch down gently on one of three pads and let a stranded astronaut climb aboard. Then blast back up, shooting meteors out of your way, and slip into the mothership’s moving bay. Land too hard, miss the pad or the bay, or run dry of fuel and the lander is lost. Six astronauts per wave — and from wave 2, saucers drop bombs. Free, no sign-up — play right in your browser.